Improvement in lard-coolers



s. c. CAS'SARD. Improvement in Lard-Coolers. N0.131,847 Y awed oct. 1, 1872 Fig/.1.

Hummm f @www GEoEGE c. cAssAED, oEBALrIMoEE," MARYLAND, AssIGNoE To HIMsELE L. oAssAnD AND J. L. cAssAnD, 0E sAME PLAGE.

' IMPROVEMENT IN LARD-COOILERS.`

Specification forming part of Letters Patent No. 131,847, dated October 1, 1872.

` specification: l v p The invention relates to that special class of machines in which melted lard is received and stirred continuously until cooled by the application of air, water, or other medium..

The invention` consists in immersing, at intervals, within the lard or receptacle one or more hollow cylinders, or sections of cylinders,

. in which are placed a cooling-Huid or other heat- It also consists in forming the` 'scrapers, which are employed to prevent adabsorbent.

hesion of the lard to the cylinders, of straight vertical slats and straight springs, arranged as hereinafter described. It also consists in com'- bining the lard-outlet valve with a rod passing through but not in contact with the rotating shaft of the machine and operating it by means of a lever located on the top of the machine. y

Figure lis a sectional elevation; Fig. 2 is a longitudinal plan view; and Fig. 3 is a detail view of the Scrapers.

` two horizontal and laterally perforated tubes, c c, through `which air may be introduced into the hot lard. Beneath these tubes are two horizontal bars, c1 c1, which have upright arms These devices, and others connected therewith, may be found elaborately described in reissue patent No. 3,358. D is a spiderfrom which are pendent hollow cylinders or sections of cylinders E E', which fall within the lard-receptacle B. These cylinders are extended as low as possible without interfering with working parts, and so as never to come in Vcontact with receptacle B. A circulation is allowed by openings in side of cylin* der, as illustrated in cylinder E, or by making the top low enough to permit the matter cooled to overflow, as illustrated in cylinder E. F is a pipe which connects the cavities of these cylinders (or parts of .cylinders) with the water-reservoir; and F1, an overflow-pipe, which is provided with cocks f to shut off vthe inlet or outlet of the liquid. G is a connecting pipe which couples with pipe F, and has a cock, g, by which the outlet `of water from the cylinder may be secured.

The operation is as follows: The molten lard being introduced into receptacle B and the shaft O rotated, different particles of lard are continually brought in contact with the metallic surfaces on both sides of theV cylinders.

These, being good conductors of heat, readily absorb the caloric from the lard, and as readily part with it to the water in the cylinders. The large exposure of coolingsurface pre sented by these cylinders causes a rapid absorption of caloric from the lard, and enables it to be cooled and drawn off with great rapidity. As a lard-tank of any capacity may be employed, and as the number of ccoling` cylinders may be multiplied in proportion, it follows that instead of operating upontwo or three -tons of lard, which is about the maximum at present, almost any number of tons may be cooled at one and the same time by the introduction of my hollow cylinders. These cylinders E E may be connected by pipes, as at F2, so that the water entering pipe F will pass through cylinder E into cylinder E and out at pipe F1, thus producing a continuous circulation of water and carrying off the latter as fast as it becomes warm. When it is desired to empty the cylinders of the liquid the cock f is closed and the cock g opened. As the pipe Gis longer than the cylinders, and passes through top of cylinder between walls and nearly to bottom, it will act as a siphon and cause the liquid to iiow therefrom. This operation will be the same whether two or more cylinders are connected.

H are the scrapers, which consist of straight boards h, of the same lengthas cylinders, and

straight springs h1, which maintain them in position. These are attached to the upright arms cz'by end-threaded shanks h3 and nuts h4, so that the board-edges will move forward and be presented obliquely to the cylinders, scrape the lard from thence, and give it a tendency toward the middle of space. This is very important, as greater attention is required to remove the lard as it thickens when it impin ges against the oblique surfaces of scrapers.

The discharge spout I is provided with a valve, J, which is attached to a valve-rod, K, that extends through the hollow shaft C, and is operated by a lever, L, on the top of the machine. By the Obliquity of these faces the action of the lard only tends to keep them` closer to the cylinder. The valve J is placed immediately over gate, but entirely Within the lard-receptacle B, because the lard was found in my patented machine to become stiftl in the neck between chamber and valve.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. One or more hollow cylinders, E E', pro- EDWARD MOORE, LEWIS GAssARD. 

